Tamim bin Tarafah narrates from Sayyiduna Jabir bin Samurah (may Allah be pleased with him): The Messenger of Allah (peace and blessings be upon him) entered the mosque while they were sitting, and he said: "Why is it that I see you in separate groups?"
Hadith Referenceالمعجم الكبير للطبراني / باب الجيم / 1818